const fs = require('fs');
fs.mkdir('./练习',err=>{
    if (err) {
        console.log(err);
        return
    }
});

let dirArr = fs.readdirSync('./../node');
console.log(dirArr);

dirArr.forEach(item=>{
    if(item != '练习'){
        let data = fs.readFileSync(`./${item}`)
            fs.writeFileSync(`./练习/${item}`,data)
        
    }
})

let textDirArr = fs.readdirSync('./练习');
console.log(textDirArr);
textDirArr.forEach(item=>{
    let arr = item.split('_');
    if (arr.length>1) {
        fs.renameSync('./练习/'+item, './练习/0'+item)
    }else {
        fs.renameSync('./练习/'+item, './练习/0-0'+item)
    }
})